You will also have to log into the web page of your SharePoint developer website.

You will have to Trust the application.

The application will load.

The information for the current user will display.

Accessing The SharePoint CSOM API

The LightSwitch SharePoint object exposed by ServerApplicationContext also gives you a method: GetHostWebClientContext() which allows you to make any SharePoint client object model (CSOM) call back into the SharePoint host. This is important because the API is constantly changing as new features are added.